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Search Results: 1 - 10 of 34031 matches for " Danilo Antonio; "
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A class of adding machine and Julia sets
Danilo Antonio Caprio
Mathematics , 2015,
Abstract: In this work we define a stochastic adding machine associated to the Fibonacci base and to a probabilities sequence $\overline{p}=(p_i)_{i\geq 1}$. We obtain a Markov chain whose states are the set of nonnegative integers. We study probabilistic properties of this chain, such as transience and recurrence. We also prove that the spectrum associated to this Markov chain is connected to the fibered Julia sets for a class of endomorphisms in $\mathbb{C}^2$.
Adaptive Radar Detection of a Subspace Signal Embedded in Subspace Structured plus Gaussian Interference Via Invariance
Antonio De Maio,Danilo Orlando
Statistics , 2015,
Abstract: This paper deals with adaptive radar detection of a subspace signal competing with two sources of interference. The former is Gaussian with unknown covariance matrix and accounts for the joint presence of clutter plus thermal noise. The latter is structured as a subspace signal and models coherent pulsed jammers impinging on the radar antenna. The problem is solved via the Principle of Invariance which is based on the identification of a suitable group of transformations leaving the considered hypothesis testing problem invariant. A maximal invariant statistic, which completely characterizes the class of invariant decision rules and significantly compresses the original data domain, as well as its statistical characterization are determined. Thus, the existence of the optimum invariant detector is addressed together with the design of practically implementable invariant decision rules. At the analysis stage, the performance of some receivers belonging to the new invariant class is established through the use of analytic expressions.
Dissociable processes underlying decisions in the Iowa Gambling Task: a new integrative framework
Andrea Stocco, Danilo Fum, Antonio Napoli
Behavioral and Brain Functions , 2009, DOI: 10.1186/1744-9081-5-1
Abstract: A behavioral experiment was carried out with a modified version of IGT. In this modified version, participants went through an additional phase of interaction, designed to measure performance without further learning, in which no feedback on individual decisions was given. A secondary distractor task was presented in either the first or the second phase of the experiment. Behavioral measures of performance tracking both payoff and frequency sensitivity in choices were collected throughout the experiment.Consistent with our framework, the results confirmed that: (a) the two competing cognitive processes can be dissociated; (b) that learning from decision outcomes requires central cognitive resources to estimate long-term payoff; and (c) that the decision phase itself can be carried out during an interfering task once learning has occurred.The experimental results support our novel description of the cognitive processes underlying performance in the Iowa Gambling Task. They also suggest that patients' impairments in this and other gambling paradigms can originate from a number of different causes, including a failure in allocating resources among cognitive strategies. This latter interpretation might be particularly useful in explaining the impairments of patients with ventromedial prefrontal cortex lesions and, by extension, the contribution of this brain region to human decision making.Gambling paradigms are widely used to investigate the relationships between emotions and decision making in behavioral [1,2], neuropsychological [3-5], and neuroimaging studies [6-10]. The most frequently used gambling paradigm, the Iowa Gambling Task (IGT), was originally designed to measure the impulsive conduct of patients with ventromedial prefrontal cortex (VMPFC) lesions [3]. In the IGT, participants repeatedly select a card from the top of four decks, indicated as A, B, C, and D. Each selection returns an immediate win, with the amount dependent on the chosen deck. At times, ho
Comparing serial and nonserial sexual offenders: alcohol and street drug consumption, impulsiveness and history of sexual abuse
Baltieri, Danilo Antonio;Andrade, Arthur Guerra de;
Revista Brasileira de Psiquiatria , 2008, DOI: 10.1590/S1516-44462006005000067
Abstract: objective: to evaluate the differences between serial and nonserial sexual offenders in terms of alcohol and drug consumption, impulsivity, and personal history of being sexually abused. method: a sectional and retrospective study carried out by the team of the outpatient clinic for the treatment of sexual disorders at faculdade de medicina do abc - santo andré, brazil. three groups of subjects (n = 198) consisting of sexual offenders against one victim, two victims and three or more victims were examined. convicts sentenced only for sexual crimes were evaluated with the drug addiction screening test, the cage, the short alcohol dependence data, the barratt impulsiveness scale, the sexual addiction screening test, and the static-99. results: sexual offenders against three or more victims showed more frequent history of being sexually abused than the sexual offenders against one victim. a one-way analysis of variance indicated that sexual offenders against three or more victims evidenced significantly higher scores on the barratt impulsiveness scale and on the sexual addiction screening test than did the sexual aggressors against one victim. after a multinomial logistic regression analysis, the barratt impulsiveness scale and the history of being sexually abused were predicting factors for the group of aggressors against three or more victims in relation to the aggressors against one victim. conclusions: sexual offenders against three or more victims present different characteristics from other groups of sexual offenders and these findings can help to create proposals for the management of this type of inmates.
Efficacy of acamprosate in the treatment of alcohol-dependent outpatients
Baltieri, Danilo Antonio;Andrade, Arthur Guerra de;
Revista Brasileira de Psiquiatria , 2003, DOI: 10.1590/S1516-44462003000300007
Abstract: objective: to evaluate the efficacy and security of acamprosate in the treatment of 75 men, aged 18 to 59 years, with diagnosis of alcohol dependence according to the icd-10. methods: double-blind, placebo-controlled study, 24-week long. after a one-week detoxification period, patients were randomly divided in two groups: the first group received acamprosate (six tablets of 333 mg/d for 12 weeks) and the second group received placebo (six tablets for 12 weeks). after the first 12 weeks, patients continued the follow-up for further 12 weeks without medication. results: patients who were receiving acamprosate showed significantly higher continuous abstinence time within the 24 weeks of treatment compared with patients who were assigned to placebo treatment (p=.017). twenty-five percent of patients who were receiving acamprosate and 20% of the placebo-treated patients dropped out. few side-effects were reported in both groups. conclusion: acamprosate proved to be safe and effective in treating alcohol-dependent patients and to maintain the abstinence during 24 weeks.
Criminal career-related factors among female robbers in the state of S?o Paulo, Brazil, and a presumed 'revolving-door' situation
Mauá, Fernando Henrique Nadalini;Baltieri, Danilo Antonio;
Revista Brasileira de Psiquiatria , 2012, DOI: 10.1590/S1516-44462012000200010
Abstract: introduction: risk-taking behaviors, family criminality, poverty, and poor parenting have been frequently associated with an earlier onset of criminal activities and a longer criminal career among male convicts. objective: this study aims to identify factors related to the onset and recurrence of criminal behavior among female robbers in the state of s?o paulo - brazil. method: it was a cross-sectional study carried out inside a feminine penitentiary in s?o paulo. from june 2006 to june 2010, 175 inmates convicted only for robbery were recruited to be evaluated about family antecedents of criminal conviction, alcohol and drug misuse, impulsiveness, depressive symptoms, and psychosocial features. results having family antecedents of criminal conviction consistently predicted an earlier onset of criminal activities and a longer criminal career among female robbers. drug use in youth and the severity of drug misuse were significantly related to the initiation and recurrence of criminal behavior, respectively. discussion: prisons must systematically screen detainees and provide treatments for those with health problems in general. children of inmates should obtain help to modify the negative consequences of their parents' incarceration in order to mitigate the negative consequences of pursuing this 'static' factor.
Tratamento farmacológico da dependência do álcool
Castro, Luís André;Baltieri, Danilo Antonio;
Revista Brasileira de Psiquiatria , 2004, DOI: 10.1590/S1516-44462004000500011
Abstract: the pharmacological intervention can play a crucial role in the reduction of craving and drinking and the maintenance of abstinence. this article reviews pharmacotherapy for alcohol dependence with an emphasis on the naltrexone, dissulfiram and acamprosate. the opioid antagonist naltrexone lowers relapse rate, reduces drinking days and prolongs periods of abstinence. acamprosate restores the normal activity of glutamate and gaba systems. disulfiram has been shown to be most effective for patients who believe in its efficacy and remain compliant with the treatment. ondansetron, has shown promise in the early-onset alcohol dependence but needs more extensive study. topiramate (up to 300 mg per day) was more efficacious than placebo in the treatment of alcohol dependence.
Efficacy of acamprosate in the treatment of alcohol-dependent outpatients
Baltieri Danilo Antonio,Andrade Arthur Guerra de
Revista Brasileira de Psiquiatria , 2003,
Abstract: OBJECTIVE: To evaluate the efficacy and security of acamprosate in the treatment of 75 men, aged 18 to 59 years, with diagnosis of alcohol dependence according to the ICD-10. METHODS: Double-blind, placebo-controlled study, 24-week long. After a one-week detoxification period, patients were randomly divided in two groups: the first group received acamprosate (six tablets of 333 mg/d for 12 weeks) and the second group received placebo (six tablets for 12 weeks). After the first 12 weeks, patients continued the follow-up for further 12 weeks without medication. RESULTS: Patients who were receiving acamprosate showed significantly higher continuous abstinence time within the 24 weeks of treatment compared with patients who were assigned to placebo treatment (p=.017). Twenty-five percent of patients who were receiving acamprosate and 20% of the placebo-treated patients dropped out. Few side-effects were reported in both groups. CONCLUSION: Acamprosate proved to be safe and effective in treating alcohol-dependent patients and to maintain the abstinence during 24 weeks.
Virtual games and quality of life in Parkinson’s disease: A randomised controlled trial  [PDF]
Glicia Pedreira, Antonio Prazeres, Danilo Cruz, Irênio Gomes, Larissa Monteiro, Ailton Melo
Advances in Parkinson's Disease (APD) , 2013, DOI: 10.4236/apd.2013.24018
Abstract: Objective: To evaluate the efficacy of Nintendo Wii training in quality of life in Parkinson’s disease (PD) patients when compared to traditional physical therapy (PT). Methods: A randomized, single-blinded trial with 2 parallel arms was performed in a referral center for movement disorders in North-eastern, Brazil. Forty-four PD outpatients that fulfilled the eligibility criteria with mild to moderate motor impairment were randomized. Both groups executed a warm up session for 10 minutes that consisted of trunk flexion, extension and rotation, associated with upper and lower limbs stretching. The PT group followed a program that consisted of trunk and limb mobilisation, balance, muscle strengthening, rhythmic movement, postural alignment, double-task execution, bimanual tasks, and gait training. The Nintendo Wii group executed a sequence of tasks according to a previously established protocol, with similar training exercises. Duration of exercises was 40 minutes per session, 3 days per week for 4 weeks. The primary endpoint was the total score obtained in the Parkinson’s disease quality of life questionnaire (PDQ-39) translated from English to Brazilian Portuguese by Oxford outcomes. Secondary endpoints were the scores achieved by each group in the following domains of PDQ-39 scale: mobility, activities of daily living (ADL), emotional well-being, stigma, social support, cognition, communication and bodily discomfort. Assessments were performed before and after intervention in both groups with subjects in the “on” period. Results: Subjects in the Nintendo Wii group showed greater improvement in the PDQ-39 total score when compared to PT group (p = 0.01). Also, significant differences were observed in ADL, stigma, social support and communication when comparing subjects before and after intervention in the Nintendo Wii group (p < 0.05). Conclusions: The results achieved in this trial suggest that rehabilitation using Nintendo Wii may have beneficial effects in quality of life of PD subjects, when compared to traditional PT. Further larger randomised controlled-trials are necessary to reassure these results.
A Unifying Framework for Adaptive Radar Detection in Homogeneous plus Structured Interference-Part II: Detectors Design
Domenico Ciuonzo,Antonio De Maio,Danilo Orlando
Statistics , 2015,
Abstract: This paper deals with the problem of adaptive multidimensional/multichannel signal detection in homogeneous Gaussian disturbance with unknown covariance matrix and structured (unknown) deterministic interference. The aforementioned problem extends the well-known Generalized Multivariate Analysis of Variance (GMANOVA) tackled in the open literature. In a companion paper, we have obtained the Maximal Invariant Statistic (MIS) for the problem under consideration, as an enabling tool for the design of suitable detectors which possess the Constant False-Alarm Rate (CFAR) property. Herein, we focus on the development of several theoretically-founded detectors for the problem under consideration. First, all the considered detectors are shown to be function of the MIS, thus proving their CFARness property. Secondly, coincidence or statistical equivalence among some of them in such a general signal model is proved. Thirdly, strong connections to well-known simpler scenarios found in adaptive detection literature are established. Finally, simulation results are provided for a comparison of the proposed receivers.
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